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Weighing and dosing

Weighing and dosing

Weighing and dosing bulk products into a process

It is often necessary to weigh and dose powder, amongst other bulk materials, into a process. Let’s take the addition of sugar into a mixer as an example from the food industry.

According to the recipe, a total of 150 kg of sugar must be added to the mixer. The conveyor system used requires ten conveying cycles of 15 kg each. Depending on the design of the system, delivery rates of up to 4 t / h are also possible. The accuracy of the system is 99 – 99.7% of the target weight to be achieved.

Weighing and dosing bulk products

The removal from different pick-up locations is possible as well as the adjustment and storage of recipes. A quick intervention in the process is possible via the device control’s intuitive touch display. In addition, the entire process can of course also be controlled fully automatically.

The Volkmann CONWEIGH is a combined conveying and dosing system and is usually used for adding quantities from 2 kg upwards per unit.


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#VacuumConveyorSystem #Hygienic #Dosing #Food #CrystalSugar #Vanillin #PowderedSugar #ExplosionRisk #Powder #Granules # Bulk #ExProtection #MinimumIgnitionEnergy #MIE

Feed bagged goods in the process

Feed bagged goods in the process

Feed large quantities of bagged goods in to the process

There are many processes in which bulk products need to be introduced in large quantities from sacks and bags. For example, in to a mixer or stirred tank, this is often the case in the food or chemical industries.

RNT 180 with lumpbreaker and conveyor belt

The sacks are loaded on to the conveyor belt which transports these to the loading station activated by a foot switch, where the sacks are then opened and emptied. A waste chute makes it possible to dispose of the empty bags laterally into a waste bag compactor.

To help reduce the dust inside while loading there is the option to either connect the product loading station up to a local extraction system or to have a dedicated vacuum conveyor for dust removal.

lump breaker

If the product tends to form lumps during storage, a lump breaker can be connected under the feed hopper. This crushes lumps up to about fist-sized lumps.


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#BaggedGoods #EmptySackCompressors #ConveyorBelt #LumpBreaker #Food #Chemistry #Lumps #Agglomerates #Volkmann #VacuumConveyors #VacuumConveying #RNT180 #DustExtraction

Conveying and dosing in the food sector

Conveying and dosing in the food sector

Conveying and dosing of powders and solids in the food sector

In regards to bulk goods the food industry is very interesting because hardly any other sector can offer such a variety of different powders, granules and bulk or piece goods.

A wide variety of handling tasks for example the finest powders, corn starch, spices, mushrooms and even bacon cubes. In terms of process technology, the methods for transport and dosing are as diverse as the products themselves.

Purely mechanical conveyor systems often reach their limits, be it for hygienic reasons or for explosion protection reasons. A simple screw conveyor, for example, conveys product, but it never gets completely empty and is difficult to clean.

At the same time,  granulated sugar, for example, places so much stress on the mechanical system that powdered sugar is produced, which in turn has a very low minimum ignition energy (MIE), which increases the risk of explosion. Vanillin powder tends to form lumps in dosing screws, which can undoubtedly disrupt the subsequent mixing process. Vacuum conveyors in combination with vibratory feeders can elegantly solve these problems.


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#VacuumConveyor #Hygienic #Dosing #Food #CrystalSugar #Vanillin #PowderedSugar #ExplosionRisk #Powder #Granules #Bulk #Exprotection #MinimumIgnitionEnergy #MIE

Metal powder handling

Alu+Edelstahl Pulver

The correct handling of powders within the additive manufacturing industry

Whether it is metals or plastics there are numerous different powder handling tasks to be solved within the Additive Manufacturing (AM) industry.

However, for various reasons, metal powders represent a greater challenge for powder handling. This involves the powder supply to the 3D printers the recovery of unbound material and its reclassification and recovery (recycling) for reuse.

With the Volkmann PowTReX, the combination of the process steps of vacuum conveying, controlled sieve dosing and ultrasonic screening represents a compact platform to solve these demanding tasks.

Printer and PowTReX

In connection with the correct container and container handling, safe, sealed and – if necessary – inert powder handling can be achieved. This means that not only stainless steel powders, also aluminum and other sensitive metal powders, for example, can be safely handled.

You can find more information HERE: Additive Manufacturing


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#Volkmann #PowTReX #MetalPowder #StainlessSteel #Aluminium #3Dprinting #Classification #Recovery #VacuumConveying #PowderHandling #AdditiveManufacturing #Inert

PPC 200 INEX chemistry

PPC 200 INEX chemistry

INEX conveyor with HALAR coating

A powdery intermediate product from the chemical industry is to be removed from a container – still wet from the centrifuge manufacturing process- and conveyed into a dryer.
The container is on the third floor, the dryer is on the second floor. The customer required a safe and reliable conveying system for the transfer, as the mix of materials are difficult to handle and reactive.

The product from the centrifuge is still wet (wet cake) and contains, among other things, dichloromethane and toluene. Because of this, all parts in contact with the product have been provided with a conductive coating (HALAR). In addition all parts who comes into contact with the gas-air mixture has been coated to prevent the surfaces from corroding.

The Multijector vacuum pump was also made entirely of PVC.

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#Volkmann #PPC #INEX #ExplosionProtection #GasExZone #Coating #HALAR #ChemicalResistance #Chemistry

Pneumatic vacuum conveying

Pneumatic vacuum conveying

ATEX and explosion protection for pneumatic vacuum conveying of powders and bulk materials

In recent years, the requirements for the transportation of solids have increased significantly. Especially when used in EX areas.

Since mechanical conveying systems often reach their limits here and can represent an ignition source in various ways, the focus is on pneumatic conveyor systems.

The so-called vacuum conveying system, offers particular advantages here. The free from ignition source design and construction allows the use with dusts with very low minimum ignition energies (MIE).

A low conveying speed is achieved by the plug conveying. Based on the ignition source-free design, simple additional features also enable use in the gas EX area.


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#ExArea #EX #GasEx #MinimumIgnitionEnergy # VacuumConveying #ATEX #IgnitionSource # PlugExtraction

Weighed product loading task

Weighed RNT hopper

Pre weigh product batch and load to process on demand

Do you need to add a pre weighed product batch into your process? Our modified bag loading weighing station – RNT 180 makes it possible to safely and reliably introduce a pre-weighed quantity into your process, for example into a mixer.

The various ingredients can be pre weighed and loaded into the station before use utilising the inbuilt weighing system. As soon as required, the whole load can be easily transferred into the process by vacuum conveying

The RNT hopper is mechanically isolated to allow accurate weighing. Vacuum transfer of materials ensures minimal dust is generated during loading

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#Volkmann #RNT #BaggedGoods #Weighed #Dosing #MixerLoading #Automation #Industry

Conveying bagged goods with lumps

Conveying bagged goods with lumps.

Sometimes after long periods in storage, or due to the nature of the product, agglomerates can occur in bags and other storage containers. These can lead to blockages in the suction line during conveying or with negative influences in the downstream processes, because, for example, products can no longer be efficiently mixed.

For this reason the VOLKMANN lump breaker was developed. This can be mounted directly by a flange, for example under the RNT 180 (rip and tip sack loading station), and breaks down bigger agglomerates before being conveyed.



Installation under a big bag emptying station is also possible. Due to its design, the lump breaker is easy to clean and, due to our type model examination, it can also be used in dust and gas ex-zones.

The RNT180 has a buffer volume of approx. 180 liters and can be expanded to up to 400 litres, if required. In addition, the station can be used with sensors, various emptying aids or as a weighed version.

Contact our application experts for more information on the RNT180 product feed station or the lump breaker. >> Contact


#ProductCharging #Bags # RNT180 #LumpBreaker #Agglomerates #Lumps #ATEX #EX #BigBagEmptying

Metal powder recovery made easy

Metal powder recovery made easy

Metal powder recovery made easy.

The PowTReX is a vacuum, transfer, sieving and recovery system for metal powders, developed for use in the ​​additive manufacturing (AM) industry. It is used to transport metal powder from, for example, 3D printers and unpacking stations with a high and constant suction power. The extracted powder is sieved and the material with the appropriate particle size can be automatically returned to the process.

PowTReX (left) at the fair. Formnext 2019 / Frankfurt am Main

The system has a small footprint of less than 1 m² and offers a high and stable material throughput. The PowTReX is a reliable, safe and easy to use system which utilises a HEPA filter for protecting against harmful substances. Installation in an EX zone 22 is also possible because it is an ATEX-approved system with type-tested components. It is operated using a touch display and one-button operation.


You can find more information about solutions for “Additive Manufacturing” in our area >> here.


With this system, classification of all common types of metal powder and their alloys for additive manufacturing is possible (including stainless steel, aluminum, titanium, amongst others). Operation under fully inert conditions with a residual oxygen content of <1% is also possible, as is a complete closed loop solution for the inert gas recirculation.

#PowTReX #MetalPowder #Classification #AM #3Dprint #UnpackingStation #ATEX #Argon #Inert

PowTReX in the UK

PowTReX in the UK

Volkmann are proud to support Materials Solutions, based near Worcester in the UK, who are a Siemens business (since 2016). They utilise additive manufacturing (AM) technologies for the production of parts and tools for the aerospace, automotive and power generation industries worldwide using a variety of metal powders including Ni superalloys, Ferrous alloys and Aluminium alloys.

Materials Solutions has seen an increase in production which has led to the company’s expansion to a larger facility to accommodate additional AM machines to keep up with demand. Their new larger facility now boasts a greater selection of AM machines from various suppliers and in different sizes to increase their manufacturing flexibility. This increase in demand meant that a more efficient, reliable and versatile processes was required to help speed up the powder reclassification procedure between builds.


You can find more information about solutions for “Additive Manufacturing” in our area >> here.


With some unsatisfactory powder reclassification systems trialled on site Volkmann was contacted back in early 2018 to help with an alternative solution and since then several systems have been supplied. The flexibility of the PowTReX has also enabled Materials Solutions to plan new powder handling and reclassification projects utilising Volkmann equipment which has enabled them to improve their powder reclassification process.

The PowTReX utilises a Volkmann vacuum conveyor to transfer powder from the build chamber to an ultrasonic sieve, via a dosing system which helps prevent overloading of the sieve mesh. With a sieving rate of approximately twice that to other available solutions on the market (using equivalent powder) the PowTreX is a good solution to help speed up the reclassification process.


www.materialssolutions.co.uk


#PowTReX #MetalPowder #Inert #ClosedLoopSystem #PowderHandling #ReturnToUse #Classification #Sieving

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